Interchangeable wrench.



PATENTED- 00:13.. a, 1903 o. E. GOVAR. I INTERGHANGEABLB WRENCH.

APPLiGATIOH FILED APR. 17, 190?.

10 MODEL.

INVENTOR=' WHNESSESE- M Mm ML ATTORNEY.

m: "cams PEYERS co mormumq. WASHKNGTDN. n. c.

Patented October c, 1903'.-

PATENT OFFICE.

OLIVER n. oov'An, or NEWARK, NEW JERSEY.

INTERCHANGEABLE WRENCH.

SPECIFICATION forming part of Letters Patent N 0. 740,812, dated October6, 1903.

Application filed April 1'7, 1903.

Serial No. 153,008. (No model.)

To aZZ whom it may concern;-

Be it known that I, OLIVER E. COVAR, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented and produced a new and useful Improvement in Interchangeableals of reference marked thereon, which form a part of thisspecification.

The objects of this invention are to secure a wrench of increasedconvenience and one easily convertible for difierent services, to reducethe cost of construction, and to secure other advantages and resultssome of which may be more fully referred to hereinafter in connectionwith the description of the working parts.

The invention consists in the improved interchangeable wrench and in thearrangements and combinations of parts of the same, all substantially aswill be hereinafter set forth, and finally embraced in the clauses ofthe claim. Referring to the accompanying drawings, in

which like numerals of reference indicate corresponding parts in each oftheseveral figures, Figurelisasideelevation ofawrenchofmyimprovedstructure adapted for service as a pipewrench. Fig. 2 is a frontelevation of the same. Fig. 3 shows it adapted for service as amonkey-wrench. Fig. 4 is a plan in detail of one of the jaws of thewrench,.andFig. 5 is a section on line as.

In said drawings, 6 indicates a socketed handle of the wrench. 7 is theremovable shank thereof, having at its end opposite the handle a fixedjaw 8, and 9 is a sliding jaw which is both slidable or movable on theshank when not set by a set-screw or the like and removable from theshank when the handle has been previously removed, and thusinterchangeable with another jaw of a different variety, at least two ofsuch jaws, difiering in detail, as hereinafter described, accompanyingeach wrench, one with a plain or approximately smooth biting or clampingsurface 10, adapted to lie atright angles to the longer axis of theshank, and the other having a ratcheted or toothed biting-surface 100,slightly inclined to said longer axis, as indicated in Fig. 1. The shankis separably held in the socket of the handle by a spring-catch 11,(shown in Figs. 1 and 2,) the flat or leaf spring of which is providedon its inner side with a tooth or detent 12, which enters through a holein the handle, a notch 13 in the shank thus holding said shank firmly inplace.

The sliding and interchangeable jaws 9 are held by set-screws 14, whichlatter are opposed by serrated plates 15, fitted within the passage forthe shank '7 and having their serrated surfaces engaging the shank, soas to preventslipping, the shank at 16 being correspondingly serrated orroughened to more perfectly insure against dislocation of the jaw Sunderpressure. The serrated plate is provided at opposite ends with smalltongues 25, held in place by screws 26 or otherwise, which engage thebody of the jaw to prevent longitudinal movement of the plate in eitherdirection.

The fixed jaw 8 at its projecting end is provided with a boss or lug 17and when the device is employed as a pipe-wrench I employ a separabletoothed plate 18, adapted to lie up against the inner surface of thesaid fixed jaw 8, as shown in Fig. 1.' Said plate is perforated to fitand receive the shank 7 and is provided with a spring-catch 19, bent, asat 20, to engage and be held by the boss or lug 17 the parts beingrelated, so that the plate 18 is easily and quickly fastened inoperative relation to the toothed jaw 9.

To change the monkey-wrench into a pipewrench, I simply lift the spring11, detach the shank from the handle, remove the jaw having the plainsurface 10, and then slip first the plate 18 and then the jaw 9, havingthe toothed surface 100, into their respective places and fix the sameby the means described. I then replace the handle and opcrate the toolin the ordinary manner.

Having thus described the invention, what I claim as new is- 1. Theimproved wrench, comprising a handle, a shank removable therefrom andhaving aQfixed jaw provided with a boss 17, at the extremity farthestremoved from the shank, a movable jaw and a plate interposed betweensaid jaws and at one end having a perforation to receive the shank andat the other end having a spring-catch extending from said plate intoengagement with said boss.

2. The improved wrench, comprisingahandie, a shank removable therefrom,means for fixing said shank in said handle, a fixed jaw on said shank, atoothed plate havinga springcatch to engage said fixed jaw anda movabletoothed jaw and means for fixingit upon the shank, consisting of aset-screw and a serrated plate 15, inserted at one side of the shankperforation or passage of said jaw, and means for holding said plate insaid perforation or passage, substantially as set forth.

3. The improved wrench comprising a handle, a shank having a serratedsurface and a fixed jaw, a movable jaw having a passage or perforationfor the shank and having a setscrew and a serrated plate fitting oneside of said passage and having at its opposite ends tongues forpreventing the lengthwise movement of said plate in said passage ineither direction, substantially as set forth.

4. The improved wrench," comprising a handle, a shank removably fixed insaid handle, a spring-catch adapted to detain the handle on the shank, atoothed, separable jaw having a set-screw, a toothed plate having aspring-catch and a jaw having a boss at its extremity over which thespring is adapted to ride and be caught to hold said plate against thelast-mentioned jaw, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this16th day of April, 1903.

OLIVER E. OOVAR.

Witnesses:

CHARLES H. PELL, (J. B. PITNEY.

